Combined sofa in a steel structure

Abstract

A combined sofa in a steel structure includes a sofa base, a backrest connected with the sofa base and a sofa armrest arranged on at least one end of the sofa base, wherein, the sofa base comprises a seat base frame, on which spring assembly is laid. The backrest is detachably connected to the rear side of the sofa base. With this design, during transportation, the backrest and armrest of the sofa can be disassembled, and the sofa base can be disassembled into one or a plurality of independent seat base frames, which is very convenient for transportation. The seat base frame(s) can be combined again as required for use to realize variable structures.

1 . A combined sofa in a steel structure, comprising a sofa base, a backrest connected with the sofa base and a sofa armrest arranged on at least one end of the sofa base, wherein the sofa base comprises a seat base frame, on which spring assembly is laid; the backrest is detachably connected to the rear side of the sofa base. 
     
     
         2 . The combined sofa in a steel structure according to  claim 1 , wherein one or a plurality of seat base frames are detachably connected, and the backrest is detachably connected with the back side of the sofa base. 
     
     
         3 . The combined sofa in a steel structure according to  claim 1 , wherein the sofa base further comprises a footrest base frame arranged on the front side of the seat base frame. 
     
     
         4 . The combined sofa in a steel structure according to  claim 3 , wherein the seat base frame and the footrest base frame both respectively comprises a steel plate base frame which is made by bending a steel plate into a square frame structure. 
     
     
         5 . The combined sofa in a steel structure according to  claim 4 , wherein the spring assembly comprises S-shaped arc springs and balance springs; the S-shaped arc springs are arranged in columns with intervals and detachably arranged on the steel plate base frame, and the balance springs are in an inclined way installed between the steel plate base frame and S-shaped arc springs, and between two columns of S-shaped arc springs. 
     
     
         6 . The combined sofa in a steel structure according to  claim 5 , wherein the spring assembly also comprises spring clamps of which one ends are fixed on the two opposite ends of the steel plate base frame, and the other ends are provided with fixing holes into which both ends of the S-shaped arc springs are inserted respectively at corresponding ends. 
     
     
         7 . The combined sofa in a steel structure according to  claim 2 , wherein a first installation part is arranged behind the seat base frame, and the backrest is detachably connected to the first installation part. 
     
     
         8 . The combined sofa in a steel structure according to  claim 7 , wherein the backrest is composed of wooden backrest assembly or a combination of wooden backrest assembly and steel backrest assembly. 
     
     
         9 . The combined sofa in a steel structure according to  claim 8 , wherein the steel backrest assembly comprises a steel backrest and a storage box, wherein, the storage box is arranged between the first installation part and the steel backrest; the storage box and the first installation part are detachably connected, and also, the storage box and the steel backrest are detachably connected. 
     
     
         10 . The combined sofa in a steel structure according to  claim 1 , wherein the sofa armrest comprises a first armrest plate, a second armrest plate and support timber blocks; the first armrest plate and the second armrest plate are arranged with an interval, and the support timber blocks are arranged between the first armrest plate and the second armrest plate for support.